UASB反应器的设计计算(国外英文资料).docVIP

UASB反应器的设计计算(国外英文资料) Design of the UASB reactor Design instructions UASB, a flow-type anaerobic sludge bed, is a compact, efficient anaerobic reactor, with a combination of biological reactions and precipitation. Its sludge bed has a lot of biomass, it has a high capacity, and the water in the reactor is short, so the pool capacity is greatly reduced. Equipment is simple, convenient operation, no need to set tank and sludge reflux device, does not need to fill packing, do not have to be in the reaction zone with mechanical stirring device, relatively low cost, easy management, and there is no congestion. Design parameters Parameter selection The design parameters are selected as follows: The volume load (Nv) = 10.2 kgCOD/(m3 / d); Sludge yield 0.1 kgMLSS/kgCOD; 0.5 m3 / kgCOD gas rate Design water quality Table 2.2 UASB reactors come in and out of water quality indicators The water quality indicators COD BOD SS Water quality (mg/l) 9720 5600 1440 Removal rate (%) 90 90 85 Water quality (mg/l) 972 560 200 (3) water design Q = 2500m3 / d = 104 m3 / h = 0.029 m3 / s Design calculation (1) the calculation of the volume of the reactor UASB effective volume: V is valid = Type: The design flow, m3 / s S0 - - - water COD, mg/l Nv -- -volume load, kgCOD/(m3? D) V = 2500 m3 effectively The UASB is designed as a round pool, the water is uniform and the treatment is good Take H = 9 m Use four identical UASB reactors A1 = 69.4 m2 D = 9.4 m Take D = 10 m The actual cross-sectional area is zero Is equal to PI D2 is equal to x 3.14 times 102 = 78.5 m2 The actual surface hydraulic load is Q1 = 0.6 0.6 It meets the design requirement Water distribution system design The system is designed as a circular cloth water device, and each UASB reactor is designed with 36 water points (1) parameters Per pool flow: Q = 104/4 = 26 m3 / h (2) design calculation The layout of the water system design is shown in figure 2.3 below: Ring diameter calculation: each hole service area is: A = = 2.2 m2